NEET Physics — Thermal Properties of Matter

How much heat is required to vaporize $0.15 \, \text{kg}$ of nitrogen at $-196^\circ \text{C}$? (Latent heat of vaporization of nitrogen = $2.0 \times 10^5 \, \text{J kg}^{-1}$)

What is the significance of the latent heat of fusion?

A $0.2 \, \text{kg}$ tungsten block at $250^\circ \text{C}$ is dropped into $0.5 \, \text{kg}$ water at $18^\circ \text{C}$ in a $0.1 \, \text{kg}$ silver calorimeter at $18^\circ \text{C}$. What is the final temperature? (Specific heat of tungsten = $134 \, \text{J kg}^{-1} \text{K}^{-1}$, water = $4186 \, \text{J kg}^{-1} \text{K}^{-1}$, silver = $236 \, \text{J kg}^{-1} \text{K}^{-1}$)

A $0.05 \, \text{kg}$ gold block at $1200^\circ \text{C}$ is placed in $0.5 \, \text{kg}$ water at $20^\circ \text{C}$. What is the final temperature? (Specific heat of gold = $134 \, \text{J kg}^{-1} \text{K}^{-1}$, water = $4186 \, \text{J kg}^{-1} \text{K}^{-1}$)

A metal cube has a volume of $1000 \, \text{cm}^3$ at $0^\circ \text{C}$. What will be its volume at $100^\circ \text{C}$ if the coefficient of volume expansion is $5.4 \times 10^{-5} \, \text{K}^{-1}$?